Adelman learnt to play drums aged 14 and soon formed his first group, The Insteps, also including John Altman.
A subsequent band included Peter Knight, later of Steeleye Span.
Adelman later took up photography and an early assignment included pictures for Yes' Close to the Edge album.
In late 2003, Adelman met again Steve Nardelli and Peter Banks and he drummed in a reunion of The Syn in 2004, material appearing on the release Original Syn.
[1] Adelman then chose to step away from performing, although he remained associated with the band as a photographer until 2006.